// Copyright (C) 2012 Yury Bychenkov (http://bychenkov.com).
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//  - Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//  - Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//  - Neither the name of Yury Bychenkov nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "tuple.h"

TupleBuilder::TupleBuilder():
	data(0),
	dataSize(0),
	dataCapacity(0)
{
	ensureCapacity(4);
	dataSize = 4;
}

TupleBuilder::~TupleBuilder() {
	if (data != 0) {
		delete [] data;
	}
}

void TupleBuilder::ensureCapacity(uint size) {
	uint newCapacity = (dataSize + size + 4095) & ~4095;
	uint8* newData = new uint8 [newCapacity];
	if (dataSize > 0) {
		memcpy(newData, data, dataSize);
	}
	if (data != 0) {
		delete [] data;
	}
	dataCapacity = newCapacity;
	data = newData;
}

void TupleBuilder::addBytes(const uint8* bytes, uint size, bool asc) {

    if (dataSize + 2 * size + 1 > dataCapacity) {
		ensureCapacity(2 * size + 2);
	}

	if (bytes == 0) {
		data[dataSize++] = asc ? 0x00 : 0xFF;
		return;
	}

	data[dataSize++] = asc ? 0x01 : 0xFE;

	if (asc) {
		for (uint i = 0; i < size; i++) {
			uint8 b = bytes[i];
			if (b < 0xFE) {
			    data[dataSize++] = b + 1;
			} else {
				data[dataSize++] = 0xFF;
				data[dataSize++] = b;
			}
		}
		data[dataSize++] = 0x00;
	} else {
		for (uint i = 0; i < size; i++) {
			uint8 b = ~bytes[i];
			if (b > 0x01) {
			    data[dataSize++] = b - 1;
			} else {
				data[dataSize++] = 0x00;
				data[dataSize++] = b;
			}
		}
		data[dataSize++] = 0xFF;
	}

}
